The cold chain data logger reference design can measure and record temperature information and automatically generate a PDF data log. Furthermore, it provides three additional functions: a touch-key control system, LCD information including temperature/ battery level/ time, and an embedded BC1.2 standard for a smart charger.

• Features
  

  -	Saves BOM cost and simplifies PCB layout
  	- Three-in-one MCU: system control, LCD display control, and touch key control
  	- LCD controller built-in DH1/DH2 capacitance
  	- Crystal-less USB 2.0 FS
  -	PDF data log file automatically via USB device
  	Minimal PDF library (Optimized only 39 KB of Flash and 10 KB of RAM)
  -	USB Smart Charger
  	- Battery Charge Standard 1.2
  -	GUI tool on PC synchronize device status
  	- Synchronize RTC and warning log data with Nuvoton Logger

• Specifications
  

  M258  (32-bit Arm® Cortex®-M23)
  -	Touch key controller
  	- IEC 61000-4-6 10 Vrms
  	- High touch sensitivity and high-noise  immunity
  -	LCD controller
  	- Charge pump voltage range from 2.8 V to 5.2 V
  	- Display remain in power down mode

• System Block Diagram